Road-machine



E. PRENDERGAST.

ROAD MACHINE.

APPLICATION FILED APR. I. 1919.

PatentedSept. 14, 1920.

SHEET 2.

4133 2&5 I

Wil /III! UNTTED STATES PATENT QFIQE.

EDWARD PRENDEBGAST, or sir. Louis, aissccer.

RoADuviAcHINE.

Application filed April 1, 1919. Serial No. 286,628.

T 0 all whom it may concern:

Be it known that I, EDWARD PRENDER- casr, a citizen of the United States, and resident of St. Louis and State of Missouri, have invented certain new and useful Improvements in Road-Machines, of which the following is a specification containing a hill, clear, and exact description, references being had to the accompanying drawings, forming a part hereof. I r

My invention relates to'ce'rtain new and useful improvements in road machines and has for itspriniary object, a scarifier to be used on road work, whereby the depth of the s'cari'fying' may be regulated and controlled.

A further object is to provide a road ma chine with means whereby the operating parts may be raised entirely clear of the road bed for traveling over the same. A further object is to' provide a scarifier with reversible teeth and a means whereby the weight 01" the s'c'ar'ifier can be regulated This device is referably adapted to be used in front of my sub-grader patented Sept. 10', 1918, Patent No. 1,-278,382,'which will scarify the road surface so that the subgrader can perform its work properly.-

In the drawings Figure 1 is a top plan View of device.

' Fig. 2 is a side "view of the same.

Fig. 2-3 is a rear view. 1

Fig. 1 is vertical sectional view through one of the wheels and itsadjust'ing mechanism.

Fig. 5 is a top plan View of one of the depth regulating meaiis.

Fig. 6 is a sectional view taken on the line of Fig. 1. 1

Fi 7 is a view taken on the line 7 7 of Fig. 1.

Fig.- 8 a vertical section of the mechanism made use of for turning machine on a narrow road. 7 r

In the construction of my device, I provide a'frame 1O which is preferably arranged triangular in f rm. This frame-is composed of channels 11 and 12 whichare placed or secured together as fully illustrated in Fig. 7. Between these channels and spacing them apart are the filler plates 13, these filler plates being so arranged as to leave openings'l l; into which sc'arifying teeth 15 are'inserted. These teeth are preferably made double ended so that when one 'curately regulated.

end is worn out the teeth may be readily' removed andreve'rsed, thus giving approximately double life to each tooth used.

Attached to the frame 10' near its apex and its base are the U-shaped brackets 16-, these brackets serving as uides for the boxes 17, Formed integral with the boXes' 17 is a projecting lug 18 on which the wheels 19 are secured. 1

Through the boxes 17 is formed a i' 'erti-v cal screw threaded bore 20 in which the ralsing screw 21 is located. This raising screw passesthrough the closed portion '22 of the U-shaped frame 16 and is provided on its upper end with a bevel gear 23. This bevel gear meshes in turn with a bevel gear 24 which is mounted on a shaft 25 secured in brackets 26.

Approximately the center of the shaft 25 is located a worm gear 27 which is driven by a Worm 28, the worm 28 being mounted on a shaft 29 which is mounted in bearings 30 ()no end of the shaft 29 is provided with a crank handle 31 by which the worms 28 are driven, thus placing the several gears and raising screws in operation and tends to raise and lower the boxes 17 in the ll shaped frame'16. By this means, the s'cariiying teeth can be lifted entirely clear of the road surface, when it is desired to move the machine or the depth of scarification can be ac Attached to the channels 12 is a plate 32; the object of this plate being to act as a brace for the members composing the triangular frame 10, a base for the brackets 26 and 30 and also as a platform on which act ditional weight can be loaded, when it is necessary to scarify a hard road surface.

The teeth 15, as shown in Fig. 6, are each provided with a pair of openings 33- through which bolts 34 extend, these bolts securing the teeth in position in the pockets 1 1 forinc'd by the filler plates 13.

The operation of my device is as follows:

When the device is in the position as gether with the teeth to sink down, the

depth of this being regulated by the wheels 1.9 which pass over that portion of the road bed not as yet scarlfied. I

When it is desired to again place the machine'out of operation, the movement of the crank 31 is reversed and the wheels driven downward, thus raising the teeth carried by the frame 10 from contact with the road surface. My device may be operated by any kind of motive power.

. Instead of equipping the frame 10 with scarifying teeth, the same may be equipped with cutter blades and the same method of adjustment employed, or the frame 1.0 may be equipped with both scarifying teeth and cutter blades. I On the upper surfaceof the plate 32and at the center of gravityof the frame-10, is placed a screw threaded sleeve 33 and'dire'ctly beneath the screw threaded opening, I form the opening 3% in the plate 32, so that the screw 35 may pass through the plate 32. This screw is provided at its upper endwith bores or openings 36 so as to provide for the insertion of a lever and at its lower end with a groove 37 into which the screw 38 fits, this screw swivelly holding the plate 39 to the screw 35. The object of this mechanism is to provide a means whereby my device may be readily turned and to accomplish this purpose, the traction means is first disconnected from the machine,abar or lever inserted in the openings 36 and the screw 35 driven downward. This will cause the plate '39 tocontact with the road surface and raise the entire device therefrom and by means of the swiveled mounting between the plate 39 and the screw 35, the en tire device may be swung around so as-to head in a different direction. 'The traction means can then be brought around and the machine pulled in the desired direction. This mechanism is found especially useful on narrow roads where suflicient space is not available to turn the machine by ordinary means, that is by having the traction means turn it. When the machine has been turned, the screw 35 is turned in the opposite direction which will release the plate 39 from the road surface and carry it clear thereof, while the machine is being directed over the road. 3

Having fully described my invention, what I claim is: v

1. A road machine comprising'a triangular shaped-frame, each side being composed of a pair of channels spaced apart, a series of removable teeth secured between said channels, a shaft carried by the forward end of said frame, a shaft carried by the rear end of said frame, roller supports carried by the front and rear ends of said frame, a connection between said. shafts and said roller supports, a connection between said shafts, and

reeaese a means for raising and lowering said roller supports relative to said frame.

2. A road machine comprising a frame composed of channels having their closed sides' facing each other and spaced apart, a series of cutters carried thereby and located between the channels, a pair of roller supports carried by the front and rear ends of said frame, a shaft mounted in the forward and rear end of said frame, a connection between said shafts and the roller supports, a worm gear mounted on each of said shafts, worms for operating said worm gears, a shaft connecting said worms, and means for operating said shaft.

3. A road machine comprisingatriangular frame, U-shaped brackets secured to said frame adjacent the apex and base thereof,

boxes carried by said U -shaped frames, a roller revolvably secured to the outside of each box, a screw extending through each box, a

' bevel gear secured'to the upper end of each screw and above the U-shaped frame, a second gear meshing with each of the first mentioned gears, a shaft connecting said second mentioned gears in pairs, a worm wheel mounted on each shaft, a worm operating each worm gear, a shaft on which said worm gears are mounted, bearings for supporting said shaft, and means for placing said worms in rotation.

' 4. A road machine comprising a triangular shaped frame, each of its sides being com-,

posed of a pair ofv channels, a plurality of blocksinterposed between the channels for spacing the same apart, a plate for rigidly I holding said frame in position, removable cuttingmeans carried by said frame and between the channels, U-shaped brackets carried by said frame adjacent the apex and base there.

of, roller supports slidably mounted in said U-shaped brackets, rollers carried by said roller supports, a'raising screw extending through each of said roller supports, and

means for actuating saidroller supports to cover the triangular shaped frame.

' A road machine comprising a triangu lar shaped frame composed of channel irons arranged in'pairs, a plate'for rigidly holding said frame in position, a plurality of channels, a plurality of blocks mounted bemounted at the center of gravity of said frame and secured to the plate, a support for said screw threaded socket, a screw threaded shaft mounted in said screw threaded socket and extending through the plate, means for turning the screw threaded shaft, and a plate swivelly mounted on the lower end of said screw threaded shaft beneath the plate.

7. A road machine comprising a frame, a pair of parallel members forming each side, a plurality of blocks interposed between and secured to the parallel members for holding them in a relatively spaced apart position, a plate attached to each side for holding the parallel members in rigid position, roller supports carried by said frame, a screw threaded socket mounted on said plate, a screw mounted in said socket, and a plate swivelly secured to the lower end of said screw for raising the frame and roller supports clear of the road when it is desired to'change the direction of travel of the machine.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

' EDWARD PRENDERGAST. lVitnesses:

ELIZABETH CARTALL, WALTER G. STEIN. 

